# Spiral (AI) Spiral is [[Every (Company)|Every]]'s writing tool, built by [[Dan Shipper]]'s team. It automates repetitive short-form writing in your own voice: X posts, LinkedIn posts, headlines, YouTube descriptions, release notes, summaries. Version history tells you what they learned: - **v1** (June 2024) — a prompt builder. You gave it examples, it produced more of the same. - **v2** (Nov 2024) — 200+ handcrafted spirals for common formats. - **v3** (Oct 2025) — rebuilt as a multi-agent system on Claude Opus 4. Interviews you before drafting, produces three drafts in parallel, edits against editorial principles. - **v4** (June 2026) — agent-native. ## The two mechanisms worth stealing **Stylometry instead of prompt stuffing.** The Style Engine computes a writing fingerprint from your corpus and selects the *relevant* samples for each draft. Not "here are 20 examples, match the vibe" but a retrieval step over your own writing, conditioned on what you're currently writing. This is the part most voice-matching setups get wrong, including the naive version of [[My Voice Profile]]. **Blind LLM-as-judge on every draft.** They run an eval where a judge model has to pick the generated text out of a lineup of real samples. Current score: indistinguishable 87% of the time. When the judge spots it, it explains why, and that explanation feeds back into refinement. That second one is the real product. A measurable, adversarial, always-on definition of "sounds like me" beats any amount of prompt engineering, because it closes the loop. Most people writing with AI have no metric at all; they have a vibe check that degrades as they get used to the output. ## Agent-native in v4 - **Remote MCP server** at `https://api.writewithspiral.com/mcp/`, OAuth, no API key to paste. See [[Model Context Protocol (MCP)]]. - **CLI** with `spiral write`, plus two primitives worth noting: `personalize` (rewrite in your voice) and `humanize` (strip AI tells like em-dashes). Those are the same two operations I built into my own skills. - **API** — 500+ agents connected since launch, used for blog editing, marketing copy, email drafts. Spiral stopped being a place you go and became a capability other agents call. That's the [[Agent-Native (Builder.io)|agent-native]] shift applied to writing tools, and it's the correct move: nobody wants a fifth tab, everybody wants their existing agent to write in their voice. ## Pricing $15/month personal, $25/user/month teams (both dropped $10 at v4). The Every bundle is $30/month and includes Spiral, Cora, Monologue, Proof, and Sparkle. ## My take The 87% number is the honest part of the pitch, and it's why I take this seriously. It's a falsifiable claim with a method attached, which is rare in this category. The strategic read: Every is a media company that turned its editorial standards into software. The moat isn't the model — it's Claude under the hood, same as everyone else. The moat is having opinions about writing worth encoding, and a corpus to encode them from. Anyone with a body of published work and a clear style is sitting on the same asset. I'm not switching. My own pipeline is voice profile plus humanizer plus [[AI Ghostwriter Guide|ghostwriting]] skills, and it's tuned to long-form where Spiral is short-form. But the eval loop is going into it. ## References - Product: https://www.writewithspiral.com - Spiral 4.0 Goes Agent-native (June 4, 2026): https://every.to/on-every/spiral-4-0-goes-agent-native - Introducing Spiral v3 (Oct 21, 2025): https://every.to/on-every/introducing-spiral-v3-an-ai-writing-partner-with-taste - Introducing Spiral v2: https://every.to/on-every/introducing-spiral-v2 - Introducing Spiral (v1): https://every.to/on-every/introducing-spiral - How I Built Spiral: https://every.to/chain-of-thought/how-i-built-spiral - Podcast transcript, He Built an AI Ghostwriter With Taste: https://every.to/podcast/transcript-spiral-s-creator-on-why-better-writing-means-better-thinking - Dan Shipper's announcement post: https://x.com/danshipper/status/2062628079869005876 ## Related - [[AI Ghostwriter Guide]] - [[How to create a top notch AI writing assistant]] - [[My Voice Profile]] - [[Quality non-fiction is the antithesis of AI slop]] - [[Model Context Protocol (MCP)]] - [[Agent-Native (Builder.io)]] - [[AI Agent Skills]] - [[Claude Code]] - [[Anthropic]] - [[Typefully]] - [[Dan Shipper]] - [[Every (Company)]]